Question

我希望在后期操作中模型无效时返回同一页面，并附带错误消息和query string

我的代码在这里

public ActionResult Action1(string Key)
{

    // do something
}

[HttpPost]
public ActionResult Action1(Model user)
{
    if (ModelState.IsValid)
                {
    // do some stuff here
    }
    else
     // redirect to same page with query string key and also error message
}

请建议我在模型无效时添加的行，以便通过显示错误消息保留在同一页面中。

Answer 1

public ActionResult Action1(Model user)
{
    if (ModelState.IsValid)
    {
       // all is okay
    }
    // If we got this far, something failed, redisplay form
    ModelState.AddModelError("", "The user name or password provided is incorrect.");
    return View(model);
}

Answer 2

[HttpPost]
public ActionResult Action1(Model user)
{
    if (ModelState.IsValid)
    {
    // do some stuff here
    }
    else
    {
        return this.RedirectToAction ("Action1", new { value1 = "QueryStringValue" });
    }
}

那会归还：

/controller/Action1?value1=QueryStringValue

同样根据您的评论。
您可以使用以下方法进行模型，而不是从控制器发送错误以查看模型失败。

    [Required]
    [DataType(DataType.Text)]
    [StringLength(40)]
    public string FirstName { get; set; }

    [Required]
    [DataType(DataType.Text)]
    [EmailAddress]
    public string Email { get; set; }

    [Required]
    [DataType(DataType.Password)]
    [StringLength(1000, MinimumLength = 8)]
    public string Password { get; set; }

    [Required]
    [System.Web.Mvc.Compare("Password")]
    [DataType(DataType.Password)]
    public string PasswordConfirmation { get; set; }

将查询字符串传递给mvc视图操作

2 个答案: